From: Jon Lin <jon.lin@rock-chips.com>
To: broonie@kernel.org
Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org,
linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org
Subject: [PATCH v10 5/6] spi: rockchip: Support cs-gpio
Date: Mon, 21 Jun 2021 18:48:47 +0800 [thread overview]
Message-ID: <20210621104848.19539-1-jon.lin@rock-chips.com> (raw)
In-Reply-To: <20210621104800.19088-1-jon.lin@rock-chips.com>
1.Add standard cs-gpio support
2.Refer to spi-controller.yaml for details
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
---
Changes in v10: None
Changes in v9: None
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
drivers/spi/spi-rockchip.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 950d3bce443b..fbd750b1d28e 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -157,7 +157,8 @@
*/
#define ROCKCHIP_SPI_MAX_TRANLEN 0xffff
-#define ROCKCHIP_SPI_MAX_CS_NUM 2
+/* 2 for native cs, 2 for cs-gpio */
+#define ROCKCHIP_SPI_MAX_CS_NUM 4
#define ROCKCHIP_SPI_VER2_TYPE1 0x05EC0002
#define ROCKCHIP_SPI_VER2_TYPE2 0x00110002
@@ -245,11 +246,15 @@ static void rockchip_spi_set_cs(struct spi_device *spi, bool enable)
/* Keep things powered as long as CS is asserted */
pm_runtime_get_sync(rs->dev);
- ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER,
- BIT(spi->chip_select));
+ if (spi->cs_gpiod)
+ ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, 1);
+ else
+ ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, BIT(spi->chip_select));
} else {
- ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER,
- BIT(spi->chip_select));
+ if (spi->cs_gpiod)
+ ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, 1);
+ else
+ ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, BIT(spi->chip_select));
/* Drop reference from when we first asserted CS */
pm_runtime_put(rs->dev);
--
2.17.1
next prev parent reply other threads:[~2021-06-21 10:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-21 10:47 [PATCH v10 0/6] Support ROCKCHIP SPI new feature Jon Lin
2021-06-21 10:47 ` [PATCH v10 1/6] dt-bindings: spi: spi-rockchip: add description for rv1126 Jon Lin
2021-06-21 10:47 ` [PATCH v10 2/6] spi: rockchip: add compatible string " Jon Lin
2021-06-21 10:47 ` [PATCH v10 3/6] spi: rockchip: Set rx_fifo interrupt waterline base on transfer item Jon Lin
2021-06-21 10:47 ` [PATCH v10 4/6] spi: rockchip: Wait for STB status in slave mode tx_xfer Jon Lin
2021-06-21 10:48 ` Jon Lin [this message]
2021-06-21 10:48 ` [PATCH v10 6/6] spi: rockchip: Support SPI_CS_HIGH Jon Lin
2021-06-23 16:08 ` [PATCH v10 0/6] Support ROCKCHIP SPI new feature Mark Brown
2022-02-11 3:43 [PATCH 1/6] spi: rockchip: Stop spi slave dma receiver when cs inactive Jon Lin
2022-02-11 3:43 ` [PATCH v10 5/6] spi: rockchip: Support cs-gpio Jon Lin
2022-02-11 11:48 ` Mark Brown
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